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chanid.rst

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CHANID

Syntax

CHANID [(#ch)]Btool only or

CHANID (#ch)TinyToolkit
Location BTool, TinyToolkit

QDOS uses a different sort of channel number internally to those used by SuperBASIC. These so-called channel IDs have the advantage that two channels will never have the same channel ID, even if some channels have been closed for a long time.

The function CHANID expects an open SuperBASIC channel #ch (a default channel of #1 is allowed by Btool) and returns its current internal channel ID.

Example

100 OPEN#3,con_2x1
110 PRINT CHANID(#3)
120 CLOSE#3: OPEN#3,con_2x1
130 PRINT CHANID(#3)
140 CLOSE#3

CROSS-REFERENCE

chanid is intended for use with file-open.

channel-id is the same as the Btool variant.

See SET_CHANNEL also.